"Our body is in the same condition. It is formed by a perpetual circulation of molecules; it is a flame which is ceaselessly consumed and renewed; it is a stream on whose banks one sits down, expecting to see the same water again, but the perpetual course of things always brings fresh water. Each globule of our blood is a world (and we have five millions per cubic millimetre). Constantly, without let or hindrance, in our arteries and veins, in our flesh, in our brain, all circulates,—all moves, all hurries along in a vital whirl as rapid, proportionately, as that of the heavenly bodies. Molecule by molecule, our brain, our skull, our eyes, our nerves, our entire flesh ceaselessly renews itself, and so rapidly that in a few months our entire body is reconstituted.
*****
"From estimates founded on molecular attraction it has been calculated that in a tiny drop of water taken up on the point of a pin, a drop invisible to the naked eye, measuring one thousandth of a cubic millimetre, there are more than two hundred and twenty-five million molecules.
"In the head of a pin there are not less than eight sextillions of atoms, or eight thousand millions of millions of millions; and these atoms are separated from each other by distances greater than their dimensions, these dimensions being invisible even to the most powerful microscope. If one felt inclined to count the number of these atoms contained in the head of a pin, by detaching in thought a thousand million of them per second, it would be necessary to continue the operation for two hundred and fifty-three thousand years, in order to finish the enumeration.
"In a drop of water, in the head of a pin, there are incomparably more atoms than there are stars in all the sky known to astronomers, armed with their strongest telescopes.
*****
"What upholds the earth, the sun, and all the stars of the universe in the eternal void? What upholds that heavy iron beam thrown between two walls, and upon which several stories are to be built? What keeps all bodies in shape? Force.
"The world, beings, and things, all that we see, is formed of invisible and imponderable atoms. The universe is a dynamism. God is the universal soul; in eo vivimus, movemur, et sumus.
"As the soul is force moving the body, the Infinite Being is force moving the universe. The purely mechanical theory is incomplete to an analyst who goes to the bottom of things. It is true that the human will is weak, in comparison to cosmic forces; yet by sending a train from Paris to Marseilles, a ship from Marseilles to Suez, I freely displace an infinitesimal portion of the earth's matter, and modify the moon's course. Blind men of the nineteenth century, come back to the swan of Mantua: Mens agitat molem.
"If I dissect matter, I find the invisible atom at the base of everything. Matter disappears, fades away into smoke. If my eyes had power enough to see the truth, they would see, through walls and bodies composed of separate molecules, atomic swarms. The eyes of the flesh do not see what is. The mind's eye must see. Do not rely on the evidence of your senses alone; there are as many stars over our heads in the daytime as there are during the night.